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[177.4.160.195]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2e53ac84c38sm11419096eec.13.2026.04.19.13.31.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Apr 2026 13:31:31 -0700 (PDT) From: =?utf-8?q?C=C3=A1ssio_Gabriel?= Date: Sun, 19 Apr 2026 17:30:30 -0300 Subject: [PATCH 2/4] ALSA: usb-audio: Propagate errors in scarlett_ctl_enum_put() Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260419-usb-write-error-propagation-v1-2-5a3bd4a673ae@gmail.com> References: <20260419-usb-write-error-propagation-v1-0-5a3bd4a673ae@gmail.com> In-Reply-To: <20260419-usb-write-error-propagation-v1-0-5a3bd4a673ae@gmail.com> To: Takashi Iwai , Chris J Arges , Detlef Urban , Jaroslav Kysela Cc: linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org, =?utf-8?q?C=C3=A1ssio_Gabriel?= , stable@vger.kernel.org X-Mailer: b4 0.15.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=1134; i=cassiogabrielcontato@gmail.com; h=from:subject:message-id; bh=FWL9iHDXSYoluckJLB911JktohnLlx+Aco9CRYvp9OA=; b=owGbwMvMwCV2IdZeKur/u2bG02pJDJlPrWd2H2+4PG8yo8H0aN5O7S9WC6UTizm+r5Lj4W34+ EFj2ZGwjhIWBjEuBlkxRZbVSYss93Q9uFoft8IDZg4rE8gQBi5OAZiIXxsjw9UVi8Pv6xom/DCe k6HXo7TXRsYlQbxykXTHoUohjRmWGxm+KRh8sHjdPmcvO9uzXVp9u179EQ+q8Di/6LlM9ibbsDP cAA== X-Developer-Key: i=cassiogabrielcontato@gmail.com; a=openpgp; fpr=AB62A239BC8AE0D57F5EA848D05D3F1A5AFFEE83 scarlett_ctl_enum_put() ignores the return value from snd_usb_set_cur_mix_value() and reports success whenever the requested enum value differs from the current one. If the SET_CUR request fails, the callback still returns success even though neither the hardware state nor the cached mixer value changed. Fixes: 76b188c4b370 ("ALSA: usb-audio: Scarlett mixer interface for 6i6, 18i6, 18i8 and 18i20") Cc: stable@vger.kernel.org Signed-off-by: Cássio Gabriel --- sound/usb/mixer_scarlett.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/sound/usb/mixer_scarlett.c b/sound/usb/mixer_scarlett.c index 1bb01e827654..673eb8d8724d 100644 --- a/sound/usb/mixer_scarlett.c +++ b/sound/usb/mixer_scarlett.c @@ -680,7 +680,9 @@ static int scarlett_ctl_enum_put(struct snd_kcontrol *kctl, val = ucontrol->value.integer.value[0]; val = val + opt->start; if (val != oval) { - snd_usb_set_cur_mix_value(elem, 0, 0, val); + err = snd_usb_set_cur_mix_value(elem, 0, 0, val); + if (err < 0) + return err; return 1; } return 0; -- 2.53.0